Hearing aid



FIG. 1 is a first perspective view of a hearing aid embodying our design;

FIG. 2 is a second perspective view of the hearing aid shown in FIG. 1;

FIG. 3 is a front view of the hearing aid shown in FIG. 1;

FIG. 4 is a rear view of the hearing aid shown in FIG. 1;

FIG. 5 is a left side view of the hearing aid shown in FIG. 1;

FIG. 6 is a top view of the hearing aid shown in FIG. 1;

FIG. 7 is a bottom view of the hearing aid shown in FIG. 1; and,

FIG. 8 is a right side view of the hearing aid shown in FIG. 1.

The broken lines in the drawing views illustrate unclaimed portions of the hearing aid and form no part of the claimed design. 

CLAIM I claim the ornamental design for a hearing aid, as shown and described. 